Punch and die apparatus



R. RITTMEYER. PUNCH AND DIE APPARATUS. APPLlc/mon man fm2?. 1 920.

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PUNCH AND DIE APPARATUS.

APPLlCATION FILED FEB. 27| 19,20.

1,406,081 Patented Feb. 7, 1922.

3 SHEETS-SHEET 2.

R. RITTMEYER.

PUNCH AND DIE APPARATUS; APPLICATION FILED FEB. 27. 1920.

Patented Feb. 7, 1922.

3 SHEETS-SHEET 3- UNITED STATES RUDOLF RITTMEYER, OF BROOKLYN, NEW YORK.

PUNCH AND DIE APPARATUS.

Specification of Letters Patent.

Patented Feb. 7, 1922.

Application filed. February 27, 1920. Serial No. 361,709.

To all vt1/'mm t may concern.'

Be it known that I, RUDOLF Rrr'rMEYnR, a citizen of Russia, and resident of the borough of Brooklyn, city of New York. in the county of Kings and State of New York, have invented certain new and useful Improvements in a Punch and Die Apparatus, of which the following is a specification.

This invention relates to punch and die apparatus, and its object is the production of an apparatus whereby with thedescent of the crosshead of a press, a strip of material may be operated upon to simultaneously punch a pair of plain openings with straight walls, finish the straight walls of a pair of openings previously punched, shear olf a predetermined portion of the strip and also to taper a pair of holes in the portion that is being sheared olf, one of thelatter holes tapering from one side of the portion sheared off and the other hole tapering from the other side thereof.

Fig. 1 represents vertical sections of the punch and die apparatus on the line 1, 1, of Fig. 5 and on the broken line 1, 1Ll of Fig. 6; Fig. 2 shows sections similar to F ig. 1 with the movable elements in different positions; Fig. 3 shows a section of Fig. 2 on the line 3, 3; Fig.,4 is a section of Fig. 1 on the line 4, 4; Fig. 5 is a section of Fig. 1 on the line 5, 5; Fig. 6 shows a section of Fig. 1 on the line 6, 6; Fig. 7 shows a side elevation of one of the initial operating punches; F ig. 8 represents a side view of one of the cutter punches; Fig. 9 is a right hand side view of Fig. 8; Fig. 10 shows a plan view of the piece produced by the apparatus and Fig. 11 is a section of Fig. 10 on the line 1l. l1.

The bed plate 15 of a press,rhaving the central opening 16 has extending therefrom the guide columns 21. The cross head guide of the press is shown at 22 with the cross head 23 and stop bar 23a. A sleeve 24 is formed with the said crosshead and has secured therein the shank 25 of the upper' punch holder 26 by means of the screw 27.

A punch holder plate 28 is fastened to the holder 26 by means of the screws 29. Guide openings 30 are formed in the holder 26. Screws 31 with the heads 32 are fastened to the stripper plate 33. The heads 32 of said screws are guided in the guide openings 30.

Guide openings 34, 35, 36, 37 and 38 are formed in the stripper plate 33. A stop rod 4() extends from the stripper plate 33 ahd is guided in the punch holder plate 28 and punch holder 26. From the punch plate holder 28 extend the similar plain punches 42, the similar punch cutters 43 and a top finishing tapered cutter 44. Openings 45 are also formed in the plate holder 28.

A top punch 46 with shearing edge 46a has extending therefrom thebolts 47 with the heads 48. The latter -are guided in cavities 49 formed in the holder 26. `Springs 50 bear between the heads 48 and the roofs of the cavities 49. Guide lugs 51 extend from the bottom side of the punch 46. rfwo rectangular guide openings 55 and 56 and circular guide openings 57 are formed in the punch 46. Springs 60 are supported on thestripper plate 33 and extend through openings 61 in the plate 28 and their upper ends are located in cavities 62 in the holder 26. Small cylindrical punches 64 have their upper ends fastened in the openings 45 of the plate holder 28 and have reduced cylindrical ends 65, that move through the openings 57 of the punch 46.

On the bed plate 15 is fastened the die holder 70 by means of the bolts 71. Guide openings 72 and 73 are formed in the die holder 70 for the plain punches 42 and the punch cutters 43. A cavity 74 is formed in the die holder 70. A top finishing tapered cutter 75 has its lower end fastened in the holder 7() and extends into the cavity 74 thereof. Guide openings 76 are formed in the holder 70. A die plate is indicated at 8() and has formed therein guide openings 81 and 82 which are in line respectively with the openings 72 and 73 in the holder 70.

Bolts 83 are threaded in the die plate A80 and extend through openings 84 in the holder 70 and clamp said holder 70 and the die plate 8O together. An opening 85 is formed in the die plate 8O for the bottom punch 86. Guide openings 87 are formed in the die plate 80 for the lugs 51 of the top punch 46. The bottom punch 86 has formed therewith the base flanges 92 and the upper contracted body portion 93. Rectangular' openings 94 and 95 in the bottom punch 96 are in line with the openings 55 and 56 of the top punch 46. Cylindrical openings 96 of the punch 86 are in line with the circular openings 57 in the punch 46. The bottom punch 86 is guided in the cavity 74 of the die holder 70 and is also guided in the opening` 85 in the die plate 80.

A stop plate 102 is fastened to die pla-te 80 by means of the screws 103. A supporting angle bar 104 is fastened to and abuts against one side of the die plate 80. A guide plate 105 is located upon and fastened to the die plate 80 by means of the screw 106. The angle bar 104 is fastened to the guide plate 105 by means of the screws 107. A pair of stop slides 108 and 109 have each formed therewith the elongated opening 110 and the operating leg 111. Guide screws 112 extend through the openings 110 and are in threaded engagement with the die plate 80.

Stop notches 113 and 114 are formed in the slides 108 and 109. Springs 115 are located in the cavity 116 of the die holder 70 and bear between a wall of said cavity and the legs 111. A guide disc is shown at 120 which has formed therein openings 121 which are in line with the openings 76 in the die holder 70. The guide disc 120 is fastened to the holder 70 by means of the screws 122. A stem 123 is fastened at its upper threaded end 124 to the guide disc 120. A disc 127 is threaded for the guide rodsV 125, which latter extend through the openings 76 and 121 and bear against the punch 86.

A nut 130 is in threaded engagement with the lower end of the stem 123 and supports the washers 131 and 132. A spring 133 bears between the washer 132 and the disc 127.

In the bottom punch 86 and disc 127 are fastened a pair of tubular guides 135 which are in line with the cylindrical openings 96. The tubular guides 135 are guided in openings 136 of the die holder 70 and in the openings 137 of the disc 127.

In Figs. 10 and 11 is represented an exempliication of an element of a musical instrument that can be produced by the punch and die apparatus. The element is shown to be a rectangular plate 140 with the tapered openings 141 and 142. The taper of the opening 141 iiares out from the bottom Vface of the plate and the opening 142 flares Cyliir' out from the top face of the plate. drical openings 143 are also formed in the plate 140 by the apparatus.

To use the punch and die apparatus the material operated upon, in this instance a stripof metal 145 equal in width to the length of the plate 140i` to be produced. is fed upon the supporting angle bar 104 with one of its sides bearing against the adjacent side edge of the plate 105. The strip 145 is fed into the apparatus until its forward end bears against the stop notch 113 ofthe slide 108, which latter has been previously pushed in by the operator. The strip 145 is now in proper position to be punched by'the first or plain pair of punches 42 to form the two initial openings having parallel walls in said strip. After thel punches 42 have pierced the strip 145 they will enter the openings 81 of the die plate 80.

During the descent of the cross head 23 the stripper plate 33 contacts with vthe strip 145 after the punch cutters 43 have entered the guide openings 82. The functions of the other elements will be described as they come into operative use. Thecross head may now be considered as rising and during its rise the tension of one of the springs 115 automatically moves the stop slide 108 out of the path of the strip 145. Next the operator pushes in the stop slide 109 and also pushes forward the strip of material 145 until its forward end bears against the stop notch 114 of the stop slide 109. The cross head 23 now descends a second time and the punches 42 punch a second set of initial openings in the strip 145 as already described,` and the punch cutters 43 clean the first set of openings that were made in the strip by the said punches 42. The stripper plate 33 comes again into contact with the strip 145 after the punch cutters 43 have entered the guide openings 82. The cross head may now be considered as again rising and while rising the strip 145 is again pushed forward by the operator until its forward end bears against the adjacent side of the bottom punch 86. The cross head may now be considered as again descending and during this descent no work is performed on the first or initial pair of holes punched in the strip, as they are not at this time in line with any of the cuttingedges of thel devices, as plainly shown in Figs. 1 and 2, but the second pair of holes formed in the stripV are acted upon by the punch cutters 43 and a third pair of preliminary openings are formed in the strip 145 by the-punches 42 as shown in Fig. 2. rThe crosshead 23 may again be considered as rising and then the operator slightly tilts the forward end of the strip 145 from the position shown in Fig. 1 so that it can pass the stop formed by the bottom punch 86. The strip 145 is now pushed forward against the adjacent side ofthe stop plate 102. The first pair of openings that were punched in the strip 145 will now be under and in. line with the openings 55 of the top punch 46 andthe openings 95 of the bottom punch 86. The crosshead 23 now descends and the tapered cutters 44 and 75 enter the first openings that were formed in the strip 145 from opposite sides thereof and taper said openings bv means of the tapered ends of said punches. At the same time the cutting ends of the punches 64 formthe cylindrical openings 143 in the strip 145, and with the cutting edge 46a of the punch 46 shears off the strip 145 to form the rectangular blocli'140 with the proper width.

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It will be noted that upon the descent of the cross-head 43 and after the strippe-r plate 33 has contacted with the strip 145 the springs 60 and 50 will be compressed until the upper face of the punch 46 bears against the lower face of the plate 28. The heads 82 of the bolts 31 guide the stripper plate 33. Upon the further descent of the cross-head 23 and after the shearing edge 46a of the punch 46 has performed its function, the said punch 46 will enter the opening 85 of the die plate 80 and force the punch 86 into the cavity 34. At this instant the sheared off plate 140 is clamped between the adjacent face-s of the punches 46 and 86, by means of which the top and bottom faces of the plate 140 are flattened in case the said plate was distorted from being' sheared by the cutting edge 46a. If any openings or deformations exist in the plate, the walls ofthe openings 85 and the finishing tapered cutters 44 and 75 will press the said plate 140, to deliver it in perfect form. At the same time the guide rods 125 are forced down by the punch 86, thereby compressing the spring 133. The plate sheared from the strip 145 is forced into the opening 85 between the punches 46 and 86 and as already stated the tapered punches 7 5 and 46 from opposite directions enter the openings in the plate 140 that is being formed. rlhe crosshead 23 has now descended to its lowest position as indicated in Fig. 2, after which it rises and during the ascent the spring 133 raises the plate 127 which latter carries the guide rods 125. By this means the punch 86 is raised and with it the punched plate 140 is lifted. The stripper plate 33 will be maintained in its lowest position when the tension of the springs 6() perform their function. When the crosshead 23 is at the upper end of its stroke the rod 40 bears against the stop bar 23n to locate the stripper plate 33 in proper position and thereby help the springs 6() to perform their function.

It will be noted that when the strip 145 has been first operated upon by all the punches and cutting edges, that thereafter all these instrumentalities operate at one stroke of the crosshead 23 to perform the different operations that produce the rectangular plate 140.

One of the novel features of the punch and die apparatus is to produce plates like 140 without wasting any material excepting that forced out when making the openings 141 and 142.

Having described my invention what I desire to secure by Letters Patent and claim is:

1. In a punch and die apparatus the combination of a .top tapered cutter and a bottom tapered cutter and means to simultaneously operate the cutters to produce a pair of tapered openings in the material operated upon, the taper of one opening tapering in a direction opposite to the taper of the other opening. A

2. In a punch and die apparatus the combination of a reciprocating cross-head, an upper punch holder' connected to the crosshead, a top punch suspended from the punch holder, the said top punch having a shearing edge and a pair of guide openings, `pliable means to force the top punch from its holder, a top finishing tapered cutter moving with the cross head and guided in one of the guide openings of the top punch, a bottom punch vertically in line with the top punch and having a pair of guide openings vertically in line with the openings of the top punch, flexible means to support the bottom punch and a stationaryl bottom finishing tapered cutter guided in one of the openings of the bottom punch and in the other opening of the top punch, the said top finishing cutter being also guide-d in the other' opening of the bottom punch..

3. In a punch and die apparatus, the combination of a flexibly suspended top punch having a pair of guide openings, a reciprocating top finishing' tapered cutter guided in one of the guide openings of the top punch, a flexibly supported bottom punch having a pair of guide openings vertically in line with the top punch and a stationary bottom finishing tapered cutter guided in one of the openings of the bottom punch and in the second opening of the top punch, the top finishing tapered cutter also guided in the second opening of the bottom punch.

4. In a punch and die apparatus the combination o f a reciprocating cross head, an upper punch holder secured to the cross head, a punch plate holder fastened to the punch holder, a stripper plate suspended from the punch plate holder, springs bearing between the stripper plate and the upper punch holder, a pair of plain punches extending from the punch plate holder' Vand a pair of punch cutters extending from the punch plate holder, the said punches and cutters guided in openings in the stripper plate.

5. In a punch and die apparatus the combination of a cross head guide of a press, a stop bar connected to said cross head guide, a reciprocating cross head coacting with the guide, an upper punch holder connected to the cross head, a punch plate holder fastened to the upper punch holder, a stripper plate below the punch plate holder, screws with their threaded ends secured to the stripper plate, the screws extending through the punch plate holder and their heads located in guide openings in the upper punch holder, springs bearing between the upper punch holder and the stripper plate, a pair of plain punches extending from the punch plate holder and Guided in openings in the stripper plate, and 'a stop rod with one end fastened to the stripper plate, the rod passing through the punch holder plate and the punch holder and abutting against the stop bar at the end of t-he up stroke of the cross head.

6. In a punch and die apparatus the combination of a reciprocating cross head of a press, a pair of plain punches to punch openings with parallel walls moving with the cross head, a pair of punch cutters moving with the cross head, a top punch with a pair of guide openings moving with the cross head, a top finishing tapered cutter moving with the cross head and guided in one of the openings of the top punch, a. bed plate for the press, a` die holder secured to the bed plate, a die plate fastened to the top face of the die holder, said die plate having two pairs of guide openings that extend through the die holder and which are in line with the said pair of plain punches and the said pair of punch cutters, a bottom punch with base flanges, the body of the latter punch guided in an opening in the die plate and the flanges thereof guided in a cavity in the die holder', a guide disc fastened to the bottom face of the die holder, a. second disc normally bearing against the bottom face of the guide disc, guide rods extending from the said second disc, passing through the guide disc into the cavity of the die holderl and bearing against the bottom face of the bottom punch, a stem extending from the guide disc and passing through the second disc, a nut and washer at the other end of the stem and a spring bearing between the second disc and washer. y

7. In a punch and die apparatus the combination of the bed plate of a press, a die holder fastened to the bed plate, a die plate fastened to the die holder, two pairs of guide openings in the die plate extending through the die holder, a bottom punch exibly supported in the die plate and having a pair of guide openings, a` stationary bottom finishing tapered cutter extending into one of the openings of the bottom punch, a-stop plate fastened to the die plate at one side of the bottom punch, a supporting angle bar with one end fastened to the die plate, a guide plate fastened to the angle bar and to the top face of the die plate with one end thereof in line with the other side of said bottom punch and a pair of stop slides slidably fastened to the top face of the die plate.

8. In a punch and die apparatus the combination of a reciprocating cross head, a pair of plain punchesI moving with the cross head to punch a pair of openings with straight walls in an object operated upon, a pair of cutter punches moving with the cross head to clean a pair of openings previously punched by the plain punches, a top punch moving with the cross-head to shear ofl' a predetermined portion of the object operated upon, after, in a previous stroke of the crosshead, having had perforations made therein, the said top punch having guide openings therein, a pair of cylindrical punches moving with the cross head, a tapered cutter moving with the cross-head and guided in one of the guide openings of the top punch, a bottom punch with a pair of guide openings, a stationary bottom tapered cutter guided in one of the openings of the bottom punch and yielding means supporting the bottom punch, the tapered cutters and the cylindrical punches operating simultaneously.

Signed at the borough of Manhattan, city of New York in the county'of New York and State of New York this 14 day of Feb.

RUDOLF RITTMEYER. 

